Just ordered these bad boys today and awaiting delivery. It was a tough choice between these and the 6XX's, but my current and future environments were inevitably the deciding factor. Currently, I'm working from home with 3 other roommates, a dog, paper thin walls, a workspace positioned near a washer/dryer, front door, and kitchen. In the future I plan on working in coffee shops, which comes with another laundry list of external sound factors...